Patent GB-189725541-A (GB)
Title: Improvements in Type Writing Machines.
Inventor: UHLIG RICHARD WILLIAM
Filed: 1897-11-03
Granted: 1897-12-24
Abstract: 25,541. Uhlig, R. W. Nov. 3. Type-writers.-Relates more particularly to machines having revolving type-carriers. Fig. 4 shows a sectional elevation of the machine. The frame comprises a tapering body portion, and an elongated rear portion on which the carriage runs. In a curved rib 3, concentric with a shaft 15, are radial slots 4 for guiding the key levers 5 which are pivoted by means of trunnions d in grooves a, b, c of slotted parts of the frame. Spring fingers i<1> of a plate i return the key levers to normal position. The ends of the key levers 5 are cam-shaped and engage rollers 23 in two wheel-moving levers 21 pivoted one at each side of the machine. On the levers 21 are formed toothed segments engaging a toothed wheel 16 pivoted on the post 15 and resting on balls. Rotating with the wheel 16 is a toothed segment engaging an elongated pinion 28 which rotates with the type-wheel 30. Formed with this segment is a flyer consisting of arms which project into position to engage the raised end of the operated key lever. The arms are so arranged that one of them engages the key lever and stops the segment and type-wheel, and the end of the key lever then passes up between this arm and one of two other arms so as to lock the type-wheel. The ends of the arms and key levers are bevelled to better engage one with the other. The pinion 28 is formed with a sleeve 29 on which the type-wheel is placed, and it rotates on a post 31<a>. The type-wheel is made hollow with internal flanges 34, 35 and rounded inside corners. A curved universal bar 45 is arranged over the ends of the key levers, and is provided with a pin 46 guided in one of the slots 4. The ends of the bar 45 are inclined to engage the wheel-moving levers and assist in returning them to normal position. The bar 45 has also two arms which engage the flyer arms as they return to position and prevent them from vibrating. Depending from the bar 45 are arms 48<a> engaging a pivoted universal frame 52. On the latter are arms 57 which engage pins on the wheel-moving levers and assist in returning them to, and retaining them in, normal position. Springs are also provided to assist the return of parts to position. To further assist in the return of the parts, there may be provided on the shafts 18 of the wheel-moving lever arms 66 which engage a bevelled block 67 on the universal frame 52. The type-wheel is positively locked during the impression by means of a pivoted dog 62 engaging a star-wheel 61 on the lower end of the pinion 28. The dog 62 is operated by the arms 57. The universal frame is provided at its pivoted end with an arm 70 engaging an arm 75" of the hammer 73 which is pivoted at 74. On the hammer are two buffers 78 and 79 which limit the motion of the hammer. The universal bar 45 is connected to an adjustable spring 109 which regulates the tension of the keys. The elongated portion of the frame is provided with two guideplates 82 on which the lower part 83 of the carriage runs. The upper part 84 of the carriage is hinged at 85 to the part 83, and may be raised slightly, to enable the last line of writing to be seen. The rack bar 99 of the carriage co-operates with spacing-dogs on a lever 100 actuated by the universal frame and held in normal position by a spring 104. The lever 100 may also be operated by a spacing-key 106 connected to it by a rod 108. The dogs may be disengaged from the rack to free the carriage by a key lever 112. The carriage is moved by a spring drum. An alarm bell is sounded when the carriage reaches the end of its movement ; and the operation of the hammer is prevented by an arm 136 adjustably mounted on the rod 85. On the rod 85 is also a margin stop 130 which engages a stop block adjustably mounted on a ratchet bar of the frame. The rod 85 may be turned so that the margin stop 130 will clear the stop block. The type-wheel is raised to bring the second and third rows of types into printing line by means of a frame 143 operated by two shift key levers at each side of the machine. The shift key levers at one side operate to raise the type-wheel only momentarily, and the shift key levers at the other side raise it permanently until released by operating one of the first shift keys. The paper is carried by a roller 166 on to which it is pressed by a feed-roller 167. At the rear of the roller 166 is a bar 169 having a paper guide-plate 170 and guide-arms 171. On the shaft of the roller 167 is a notched wheel normally engaged by a detent so as to hold the rollers in the line of writing. The notches are a half line space distance apart. The detent may be disengaged and held away from the wheel by a hook lever. On the shaft of the roller 167 is a ratchet-wheel engaged by a pawl on a line space lever, the movement of which is limited by a pivoted adjustable stop piece. The ribbon spools are mounted frictionally on their shafts and are driven by worms on the ends of a shaft mounted in a pivoted bracket which may be swung to put either worm into gear with its spool wheel. The shaft is rotated by ratchet mechanism from the universal frame. The cover-plate 195 is provided on its rear edge with two pointers to assist in placing the paper in the machine straight. An indicator is provided on the type-wheel to denote the last letter printed and indicate the position of rest of the type-wheel. The machine is described in detail in the Specification and drawings.